(In reply to comment #2)
> Trying to reproduce this with my local build hit the following assertion
> failure:
>
> ASSERTION FAILED: m_pendingStylesheets > 0
> (/Users/matt/Code/WebKit/WebCore/dom/Document.cpp:2028 void
> WebCore::Document::removePendingSheet())
>
This is actually the 2nd time I've hit this ASSERT in the last ~36 hours - the first time was on a site that can't be posted and my initial attempts at a quick reduction failed.

(In reply to comment #3)
> (In reply to comment #2)
> > Trying to reproduce this with my local build hit the following assertion
> > failure:
> >
> > ASSERTION FAILED: m_pendingStylesheets > 0
> > (/Users/matt/Code/WebKit/WebCore/dom/Document.cpp:2028 void
> > WebCore::Document::removePendingSheet())
> >
>
> This is actually the 2nd time I've hit this ASSERT in the last ~36 hours - the
> first time was on a site that can't be posted and my initial attempts at a
> quick reduction failed.
>
After talking to Mitz, this crash is unrelated to the rendering issue.